Add Global Flag Support for Peer Node cli

[btiller123]

When using Minifab the file structure created for the peers/orgs/msp/certificates does not match up with the expected locations when using the 'peer node' cli on my local computer. Since 'peer node' cli does not support global flags that are otherwise supported by the 'peer' cli, I was forced to use environment variables, but was unable to completed resolve the dependencies due to problem using the environment variables.

Please extend the global flag support from the 'peer' cli to 'peer node' so that the Minifab generated file structure can be utilized when running the peer node cli locally.